Door-spring



(No Model.)

L. B'URGERT.

DOOR SPRING. No. 439,236. Patented Oct. 28, 1890.

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UNITED STATES PATENT OFFICE.

LEWIS BURGERT, OF TABIIE ROCK, NEBRASKA.

DOOR-SPRING.

SPECIFICATION forming part of Letters Patent No. 439,236, dated October 28,1890.

Application filed June 2, 1890. Serial No. 353,908- (No model.)

To all whom it may concern:

Be it known that I, LEWIS BURGERT, a resident of Table Rock, in the county of Pawnee and State of Nebraska, have invented certain new and useful Improvements in Door- Springs; and I do hereby declare the following to be a full, clear, and exact description of the. invention, such as will enable others skilled in the art to which it pertains to make and use the same.

The object of the invention is to provide a door-closing device that shall be simple and economical in structure and capable of easy application, and that shall also be adapted to be readily relieved from duty; and it consists in the construction hereinafter set forth and particularly pointed out.

In the accompanying drawings, Figure 1 is a plan of the door-spring applied to a door, the latter being broken away in large part.

. Fig. 2 is a partial section on the line a; m of Fig. 1. Fig. 3 is a partial plan of a modified detail, and Figs. 4. and 5'are side elevations of modified details.

Numeral 1 denotes a stile of the door-casing, 2 a door-frame, and 3 one of the doorhinges.

4 indicates the free end of a spring doorcloser and six spring-coils and five rearward extensions of the same, these parts constituting one spring.

At 13 13 the ends of the spring are bent, as indicated, for insertion in the eye or knuckle of the leaf 7 to form a hinge. Instead, however, of thus inserting the ends of the spring in the eye 10, as indicated in Figs. 1 and 2, the spring could be made entire at this point and the part 10 of the leaf 7, formed as shown in Fig. 4, placed over it and secured upon it by securing the leaf to the door-frame.

The device described above is, broadly speaking, a hinge, and is not in itself operative as a door-closing device. 11 is a bar pivoted at 12 and adapted to hold the parts 5 of the spring in fixed position, or so that they cannot be turned in the joint at 10, whereby it renders the spring active, the part at hearing upon the door when the latter is being opened. The opening of the doorwill put the spring-coils 6 under a tension which is sufficient to close the door whenever the bar 11 is held securely over the parts 5 of the spring. To relieve the spring from duty this bar is swung aside about a pivot 12 to a position indicated by dotted lines, whereupon coils, and engages the spring-retainer 11 at about its middle, whereby the latter is sustained against theaction of the spring when the door is opened.

In Fig. 3 is illustrateda modification of the retaining device, in which 15 indicatesa button that can be arranged, as indicated in full lines, to hold the spring to its work or swung 5 to the position indicated in dotted lines when the action of the spring is not desired. In

the form illustrated in Fig. 5 the retaining catch or spring let swings about its pivot to release bar 11.

The various parts above described are conveniently secured to the door or its casing by suitable screws, and it is preferably ap- 8o plied mid-height of the door. It is obvious that the number of the coils 6 can be varied and the spring otherwise modified, provided the above-described operation of the device as a whole is not departed from. It is preferred, however, to use the form illustrated,

This catch may be a 6c whereby a wide bearing of the spring upon the door is provided, as by this means the bearing is more secure and the wood-work less liable to be chafed. More than one catch 14 can be used, if desired.

Having thus described my invention, what I desire to secure by Letters Patent is- I The door-closing device consisting of the spring provided with the coils and hinged to the door-casing, in combination with a movable retaining-bar and a catch arranged in the path of said bar, substantially as setforth. In testimony whereof I have signed this specification in the presence of two subscribtoo ing witnesses.

LEWIS BURGERT.

Witnesses:-

M. H. MARBLE, D. D. MARTINDALE. 

